Final answer:
The mass of 0.750 moles of ZnSO4 is 121.035 g.
Step-by-step explanation:
The molar mass of a compound is the mass of one mole of that compound. To find the mass of 0.750 moles of ZnSO4, we need to know the molar mass of ZnSO4. Zn has a molar mass of 65.39 g/mol, S has a molar mass of 32.06 g/mol, and O has a molar mass of 16.00 g/mol. Summing up these masses, we get:
Molar mass of ZnSO4 = (65.39 g/mol) + (32.06 g/mol) + (16.00 g/mol x 4) = 161.38 g/mol
Using the formula:
Mass = Moles x Molar mass
Mass of 0.750 moles of ZnSO4 = 0.750 moles x 161.38 g/mol = 121.035 g